Thermosensitive crystallization–boosted liquid thermocells for low-grade heat harvesting

doi:10.1126/science.abd6749

GSTDTAP > 气候变化

DOI	10.1126/science.abd6749
	Thermosensitive crystallization–boosted liquid thermocells for low-grade heat harvesting
	Boyang Yu; Jiangjiang Duan; Hengjiang Cong; Wenke Xie; Rong Liu; Xinyan Zhuang; Hui Wang; Bei Qi; Ming Xu; Zhong Lin Wang; Jun Zhou
	2020-10-16
发表期刊	Science
出版年	2020
英文摘要	Low-temperature heat sources are both abundant and largely dissipated into the environment. Yu et al. discovered a way to boost the concentration gradient in a liquid thermogalvanic cell that allows low-temperature heat to be recovered. The authors added a component that boosts the concentration gradient by forcing crystallization of the electrolyte at the cold end, and these crystals then melt at the hot end. This process boosts efficiency and is a potential method for recovering low-grade heat. Science , this issue p. [342][1] Low-grade heat (below 373 kelvin) is abundant and ubiquitous but is mostly wasted because present recovery technologies are not cost-effective. The liquid-state thermocell (LTC), an inexpensive and scalable thermoelectric device, may be commercially viable for harvesting low-grade heat energy if its Carnot-relative efficiency (ηr) reaches ~5%, which is a challenging metric to achieve experimentally. We used a thermosensitive crystallization and dissolution process to induce a persistent concentration gradient of redox ions, a highly enhanced Seebeck coefficient (~3.73 millivolts per kelvin), and suppressed thermal conductivity in LTCs. As a result, we achieved a high ηr of 11.1% for LTCs near room temperature. Our device demonstration offers promise for cost-effective low-grade heat harvesting. [1]: /lookup/doi/10.1126/science.abd6749
领域	气候变化 ; 资源环境
URL	查看原文
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/299345
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Boyang Yu,Jiangjiang Duan,Hengjiang Cong,等. Thermosensitive crystallization–boosted liquid thermocells for low-grade heat harvesting[J]. Science,2020.
APA	Boyang Yu.,Jiangjiang Duan.,Hengjiang Cong.,Wenke Xie.,Rong Liu.,...&Jun Zhou.(2020).Thermosensitive crystallization–boosted liquid thermocells for low-grade heat harvesting.Science.
MLA	Boyang Yu,et al."Thermosensitive crystallization–boosted liquid thermocells for low-grade heat harvesting".Science (2020).